backpack converts person's movement to electrical energy
electrical energy

backpack converts person’s movement to electrical energy

This backpack converts the energy of a person’s movement into electrical energy

Chinese researchers have built a backpack equipped with a system similar to a car suspension. This backpack can also convert energy from a person’s movement into electrical energy.

Backrests are very useful for carrying items to different places; Because they can distribute the total weight of the equipment evenly across the body to use the strong muscles of the back and abdomen. However, this does not mean that backpacks have gone through the whole development process and they can not be made more advanced and interesting. A backpack with a lot of equipment is still heavy, and a long walk with a heavy backpack has a negative effect on your body.

Researchers in China have recently found a way to make backpacks that look 20 percent lighter than regular backpacks, according to Digital Trends . Make no mistake; This does not mean that the capacity of this backpack is less than normal backpacks; Instead, according to researchers, it will be equipped with a car-like suspension.

In an interview with Digital Media Trends, Jia Cheng , an associate professor in the Department of Mechanical Engineering at Peking University in Beijing, said that two elastomers, two sliding rails and two spool blocks are symmetrically placed on either side of the backpack. The end of one of the elastometers is attached to the top of the top acrylic plate and the end of the second elastometer is attached to the backpack frame. These components are connected by two fixed pulleys.

The load is fixed on the top acrylic plate and this plate can move up or down on the sliding rails. The weight of the load inside the backpack and the acrylic plate is adjusted by the elastic force of the two elastometers. As a result of the fixed connection between the backpack frame and the body, the frame aligns with the center of mass of the individual’s body and moves up and down.

Jia Cheng says that without moving up and down the load, the backpack carrier feels lighter when the user walks normally, which occurs normally. In the system designed by Chinese researchers, the absolute displacement of the load with respect to time is almost zero and no vertical fluctuations occur in the position of the load.

A backpack that makes the user feel lighter is certainly a sufficient achievement for many researchers; However, this statement does not apply to Cheng and his team members. The prototype backpack of this research group can receive the mechanical energy of walking and use it to power its electronic components. The backpack does this with the help of a triboelectric nanogenerator ( TENG).

You may think that in such a situation you can run the treadmill and carry your backpack to use the energy generated to charge the laptop; But it is not possible to separate the power supply to do this. Researchers say such systems can provide the energy needed for LED lights, electric clocks and fluorescent lamps. In environments where energy is not available, this backpack can be useful.

An article detailing the backpack of Chinese researchers was recently published in the journal ACS Nano  .


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